Typescript error
Open
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Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 30/100
- Issue type
- Bug
- Clarity
- Needs clarification
- Activity status
- Stale
- Tech stack
- typescript
- Domain
- build-system
Research direction
Reproduce the TypeScript 5.6.2 compilation failure and inspect the reported declarations in node_modules/lru-cache/dist/commonjs/index.d.ts, especially entries, keys, values, Symbol.iterator, and forEach. The issue is resolved when the project compiles without these TS2416 errors.
Written by the indexing model from the issue text.
Description
When compiling with Typescript 5.6.2 I get the following error:
output
node_modules/lru-cache/dist/commonjs/index.d.ts:973:5 - error TS2416: Property 'entries' in type 'LRUCache<K, V, FC>' is not assignable to the same property in base type 'Map<K, V>'.
Type '() => Generator<[K, V], void, unknown>' is not assignable to type '() => MapIterator<[K, V]>'.
Call signature return types 'Generator<[K, V], void, unknown>' and 'MapIterator<[K, V]>' are incompatible.
The types returned by 'next(...)' are incompatible between these types.
Type 'IteratorResult<[K, V], void>' is not assignable to type 'IteratorResult<[K, V], undefined>'.
Type 'IteratorReturnResult<void>' is not assignable to type 'IteratorResult<[K, V], undefined>'.
Type 'IteratorReturnResult<void>' is not assignable to type 'IteratorReturnResult<undefined>'.
Type 'void' is not assignable to type 'undefined'.
973 entries(): Generator<[K, V], void, unknown>;
~~~~~~~
node_modules/lru-cache/dist/commonjs/index.d.ts:985:5 - error TS2416: Property 'keys' in type 'LRUCache<K, V, FC>' is not assignable to the same property in base type 'Map<K, V>'.
Type '() => Generator<K, void, unknown>' is not assignable to type '() => MapIterator<K>'.
Call signature return types 'Generator<K, void, unknown>' and 'MapIterator<K>' are incompatible.
The types returned by 'next(...)' are incompatible between these types.
Type 'IteratorResult<K, void>' is not assignable to type 'IteratorResult<K, undefined>'.
Type 'IteratorReturnResult<void>' is not assignable to type 'IteratorResult<K, undefined>'.
Type 'IteratorReturnResult<void>' is not assignable to type 'IteratorReturnResult<undefined>'.
Type 'void' is not assignable to type 'undefined'.
985 keys(): Generator<K, void, unknown>;
~~~~
node_modules/lru-cache/dist/commonjs/index.d.ts:997:5 - error TS2416: Property 'values' in type 'LRUCache<K, V, FC>' is not assignable to the same property in base type 'Map<K, V>'.
Type '() => Generator<V, void, unknown>' is not assignable to type '() => MapIterator<V>'.
Call signature return types 'Generator<V, void, unknown>' and 'MapIterator<V>' are incompatible.
The types returned by 'next(...)' are incompatible between these types.
Type 'IteratorResult<V, void>' is not assignable to type 'IteratorResult<V, undefined>'.
Type 'IteratorReturnResult<void>' is not assignable to type 'IteratorResult<V, undefined>'.
Type 'IteratorReturnResult<void>' is not assignable to type 'IteratorReturnResult<undefined>'.
Type 'void' is not assignable to type 'undefined'.
997 values(): Generator<V, void, unknown>;
~~~~~~
node_modules/lru-cache/dist/commonjs/index.d.ts:1009:5 - error TS2416: Property '[Symbol.iterator]' in type 'LRUCache<K, V, FC>' is not assignable to the same property in base type 'Map<K, V>'.
Type '() => Generator<[K, V], void, unknown>' is not assignable to type '() => MapIterator<[K, V]>'.
Call signature return types 'Generator<[K, V], void, unknown>' and 'MapIterator<[K, V]>' are incompatible.
The types returned by 'next(...)' are incompatible between these types.
Type 'IteratorResult<[K, V], void>' is not assignable to type 'IteratorResult<[K, V], undefined>'.
Type 'IteratorReturnResult<void>' is not assignable to type 'IteratorResult<[K, V], undefined>'.
Type 'IteratorReturnResult<void>' is not assignable to type 'IteratorReturnResult<undefined>'.
Type 'void' is not assignable to type 'undefined'.
1009 [Symbol.iterator](): Generator<[K, V], void, unknown>;
~~~~~~~~~~~~~~~~~
node_modules/lru-cache/dist/commonjs/index.d.ts:1032:5 - error TS2416: Property 'forEach' in type 'LRUCache<K, V, FC>' is not assignable to the same property in base type 'Map<K, V>'.
Type '(fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any, thisp?: any) => void' is not assignable to type '(callbackfn: (value: V, key: K, map: Map<K, V>) => void, thisArg?: any) => void'.
Types of parameters 'fn' and 'callbackfn' are incompatible.
Types of parameters 'map' and 'self' are incompatible.
Type 'LRUCache<K, V, FC>' is not assignable to type 'Map<K, V>'.
The types returned by 'entries().next(...)' are incompatible between these types.
Type 'IteratorResult<[K, V], void>' is not assignable to type 'IteratorResult<[K, V], undefined>'.
Type 'IteratorReturnResult<void>' is not assignable to type 'IteratorResult<[K, V], undefined>'.
Type 'IteratorReturnResult<void>' is not assignable to type 'IteratorReturnResult<undefined>'.
Type 'void' is not assignable to type 'undefined'.
1032 forEach(fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any, thisp?: any): void;
~~~~~~~
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- TypeScript
- Stars
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- Forks
- 3
- PR merge metrics
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